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EEVblog #973 – Hioki Multimeter Review & Clamp Meter Teardown

Dave looks at the Japanese Hioki DT4256 Multimeter and 3280 clamp meter Forum HERE Be ...

  • Worf

    Actually, camera sensors are VERY sensitive to IR. So much so that they usually have to put on an IR blocking filter in the light path to prevent IR from screwing up the image.

    This filter doesn’t render the sensor completely IR blocking, but it attenuates the IR significantly.

  • moose

    “regular” paper will glow blue under UV, banknote paper wont, the same with the IR ( the inks are very specific to banknotes)

  • Jason

    Soon we will new US bills in circulation (Oct 8) with more security features (ie 3D security ribbon). $1 are only bills left without any changes over the last 10 years. Too bad that you only have $5 bills to test.

  • Fred Lotte

    The angled sensors are probably looking at reflected light.